(19)

(11)

EP 0 308 459 A1

(12)

(43) Date of publication: 29.03.1989 Bulletin 1989/13 (21) Application number: 88902900.0 (22) Date of filing: 31.03.1988

(51) International Patent Classification (IPC):  A61C 15/ 04( . ) (86) International application number: PCT/GB1988/000254 (87) International publication number: WO 1988/007354 (06.10.1988 Gazette 1988/22)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 03.04.1987 GB 19870008049 (71) Applicant: NEALE, Andrew David London NW5 1JL (GB)	(72) Inventor: NEALE, Andrew David London NW5 1JL (GB) (74) Representative: Alexander, Thomas Bruce, et al  Boult, Wade & Tennant 27 Furnival Street London EC4A 1PQ London EC4A 1PQ (GB)